Well the last few weeks I have been changing spark plugs, from AC Delco to Autolite Racing 132.... I have heard that the Auto lite racing plug foul out quick and often.... So here is the question how can you tell if the plug is fouled??? What does the plug look like??? I don't drive the car often now once a week for 10-15 miles... I have been taken a plug or two out after every little cruise....